Burner control apparatus



Dec. 1, 1942,, c. 'WA NTZ BURNER CONTROL APPARATUS Filed may :51, 1940 sSheets-Sheet 1 INVENTOR.

lllllllf, l! I Clare/ace zmrzi'z Dec. 1, 1942. 2,303,672

C. WANTZ BURNER CONTROL APPARATUS 7 Filed May 31, 1940 3 Sh eets-Sheet 2INVENTOR. C'ziare/zce lflfzni'z and also for the I Patented Dec. 1, 1942UNITED STATES PATENT OFFlCE'f,

2,303,672 BURNER CONTROL APPARATUS Clarence Wantz, Milwaukee, Wis,assignor to Milwaukee Gas Specialty Company, Milwaukee, Wis., acorporation of Wisconsin Application May 31, 1940, Serial No. 338,081

25 Claims.

This invention relates to burner control apparatus.

While the invention is not necessarily limited thereto, its principalfield of utility isin connection with gas burning cooking ranges of thetype in which one of the oven burner, is adapted to be placed underautomatic time control, but wherein a safety shutoff feature isassociated with this burner so that it cannot possibly receive gas ifthe pilot light associated with the burner is extinguished.

. The invention enables a single control valve to be employed for theautomatic time control safety shutoff control. The automatic timingmechanism can be of the same general type as now commonly employed intime switches for ranges comprising the usual synchronous motor-drivenclock and the adjustable controls associated therewithwhich are adaptedto be set by the housewife automatically to efiect the starting andstopping of the cooking operation at preselected times. The automatictiming mechanism is preferably arranged to actuate the control valvethrough a direct acting mechanical connection, and the automatic safetyshutofl. con- I trol is operative to prevent this same control valvebeing opened by the automatic timing mechanism in the event that thepilot light is extinguished.

One of the main objects of the preesnt invention is the provision in adevice of the general character above set forth of improved means fordisabling the operative connection between the automatic timer and thecontrol valve when the pilot light or other ignition means isextinguished or inoperative to ignite the fuel at the burner.

Another object of the invention is the provision with this improveddisabling means of improved means for resetting or cocking the device sothat the motion transmitting member between the automatic timer and thevalve will be disposed normally or as long as the pilot light is burningin a position effective to transmit vvalve opening motion from theautomatictimer to the control valve. 1

' Another object of the invention is to provide in a device of thecharacter described improved means for indicating when the device iscocked and held cocked with the motion transmitting member in its normalvalve opening motion from to the control device.

Another object of the invention is to provide an improved thermoelectricsafety shutoff and automatic timer of relatively simple and inextheautomatic timer position for transmitting a burners, such as the pensiveconstruction and which may be installed and operated conveniently andeffectively; also a device of the character described composed ofrelatively few parts and adapted'for convenient and expeditiousmanufacture and assembly, and

which will operate quickly, positively, and effectively; and will failsafe.

A further feature of the invention is in the pgovision, in a deviceofthe character described, of cocking or resetting means which may bedisposed sidewise of the axis of the electromagnet or other holdingmeans for holding the disabling means in position to permit the motiontransmitting member to remain in its normal operative position, andwhich cocking means is adapted to be actuated at an angle to the axis ofthe holding means.

While the particular structural features by which I obtain a device ofthe character set forth are important features within thelmore specificaspects of the invention, it is to be understood that the precisefeatures shown and described may be varied within the broader aspects ofthe invention.

In order to acquaint those skilled in the art with the manner ofconstructing and operating a device in accordance with the presentinvention, I will now-describe, in connection with the accompanyingdrawings, one preferred embodiment of the invention.

In the drawings:

Figure l is a fragmentary elevational view schematically illustratingone general relation of the main parts of the apparatus;

Figure 2 is a section through the safety shutofi and automatic timerdevice, taken substantially on the line 2-2 of Figure 1;

Figure 3 is a vertical section showing the op-. erative connectionbetween'the automatic timer and the control valve, the disabling meansfor the operative connection, and the resetting or cooking means;

Figure 4 is a fragmentary elevational view .showing the means forindicating when the de-' vice is cocked and held cooked with the motiontransmitting member in its normal position; and

Figure 5 is a vertical section taken substantially on theiline 5-5'0fFigure 3.

The invention can be embodied in a wide variety of forms for use with awide variety of devices, but for purposes of illustration the inventionhas been shown more or less schematically as embodied in connection witha cooking range burner. It is to be understood that the burner may beany other burner with which the automatic timer and safety shutoffdevice of the present invention is adapted for use.

In the cooking range adaptation of the invention, the burner lrepresents, for example, a typical oven burner or broiler burner. A fuelsupply pipe It leads to the burner ID for the delivery of gaseous orother fuel thereto-for example, through a mixing chamber l2 to which airis admitted in the usual way, as well understood in the art. The variousburners of the cooking range usually receive their gas from the mainmanifold or supply pipe through individual branch pipes which branch offthe main supply pipe, these branch pipes having separate manuallycontrolled valves. The fuel supply pipe H may constitute such a branchpipe for the burner l0, and the conventional manually controlled valveinterposed in this pipe is indicated at [4.

The pilot burner i5, which is located in juxtaposition to the mainburner ID to maintain a pilot flame for igniting the main burner, issupplied with gaseous fuel by a pilot supply pipe l6 which shunts themanual valve i4--for example, by having its connection with the mainsupply pipe anterior of the valve l4.

Also interposed in the fuel supply pipe H is the automatic timeractuated and safety shutoff control valve unit of the present invention,this unit being indicated in its entirety at l8 inFigure 1. The valveunit [8 is jointly responsive to the automatic timer, indicated in itsentirety at 20, and to the pilot burner l5.

The automatic timer may be any desired type of mechanism capable ofcausing the control valve unit l8 to open and close at different timespreselected by the housewife. This unit comprises a synchronousmotor-driven clock, including a clock dial 22 and hour and minute hands2-3 and 25. The clock may be a spring motor driven clock within thescope of the present invention. Rotatable concentrically around theoutside of the clock dial is a stop cooking ring 28 which has an indexpointer adapted to be placed in registration with the different hournumerals around the clock dial, the adjustable setting given this ringdetermining the time when the apparatus will interrupt the cookingoperation. Rotatable concentrically around the outside of the adjustingring 28 is an arm or other adjusting ring member 29 which is adjustableto different positions to predetermine the number of hours that thecooking operation is to continue. An index pointer on this outeradjusting ring member 29 is adapted to be placed in registration withdifferent hour and fractional hour markings on the adjusting ring 28 inpredetermining the length of the cooking interval.

The automatic timer device 20 is adapted to be placed in its normalposition and in its set position through the manipulation of the controlknob 3| which is secured to thefront end of a control shaft 33. Thecontrol shaft 33 advances clockwise with a spring-impelled step-by-stepmotion as the timer 20 goes through the cyclical steps of starting thecooking operation,'stopping the cooking operation, etc. The actuatingmember 35 is operated by the automatic timer, and when actuateddownwardly as viewed in Figure 1, is adapted to open the control valveas will presently appear.

The control valve unit I8 comprises a supporting frame 40 which issupported in juxtaposition to the timing mechanism 2l-for example, bymeans of a bracket 4| shown in Figure 3. Mounted for reciprocation inthe frame 40 is the motion transmitting member 42 which is normallyoperative to transmit motion from. the actuating member 35 to the stem43 of the control valve member 44. The motion transmitting member 42 isin the form of a stem or rod having, at its inner end, a head 45, theend of which is rounded for endwise thrusting engagement against thetapered end of the head member 45 fixed on the adjacent end of the valvestem 43.

The outer end of the motion transmitting member 42, which has a head42a, is loosely guided within a guide opening 48 formed in the wall 49of the frame 40, this opening being sufliciently large to enable themotion transmitting member 42 to assume the disabled position shown infull lines in Figure 5. The actuating member 35 is adapted to exertdownward thrust against the head at the outer end of the motiontransmitting member, the headed end of this member which cooperates withthe actuating member 35 and the cooperating end of the actuating memberbeing preferably rounded as shown. The rounded formation of the end ofthe actuating member 35 and the cooperating end of the member 42 and therounded formation of the end of the head 45 at the opposite end of themotion transmitting member avoid any interference or hindrance with thelateral displacement of the motion transmitting member 42 in the eventthat the actuating member 35 is transmitting pressure against theactuating member at the time a safety shutoff function occurs. 4

The lateral displacement of the transmitting member 42 for effecting anautomatic shutoff is performed through the medium of shifter meanscomprising a shifter arm 52 pivoted by means of a pin 53 to an angularshaped shifter member 55. The shifter arm 52 has an opening 55 throughwhich the motion transmitting rod 42 passes with a relatively loose fit.A compression spring 56 is confined between the upper side of theshifter arm 52 and the head 42a at the outer end of the rod 42, a springwasher being preferably provided at 51. The spring 55 normally thruststhe transmitter member outwardly or in an upward direction as the deviceis viewed in the drawings, and the actuating member 35 outwardly orupwardly and into proper cooperation with the time operated means foroperating the actuator member. The lower end of the pivot pin 53 carriesa roller 50, which roller operates in a channel-shaped guide 62, theguide 62 being formed in a member 64 extending transversely between thesides of the frame 40 and secured at its opposite ends thereto.

The electromagnet 58 has an armature 59 attached to the outer end of thestem 10, if desired, in a manner to permit self-accommodation of thearmature when in attracted position to the pole ends of the magnet frame12. The electromagnet and armature are enclosed within a generallycup-shaped housing 13, the inner flanged end of which is secured, forexample, by screws I4 (Figure 1) to the adjacent end of the frame 40.housing 13 is closed by guide and closure means shown as comprising acup-shaped member 15 having pressed fit or other suitable engagement inthe inner end of the cup-shaped housing 13. Suitable sealing material I5is provided between the member 15 and a spring disk 18 and around thestem 13 to prevent the passage of dust or other foreign matter into theelectromagnet and armature housing along the stem 10.

The inner end of the cup-shaped v tween the automatic timer The stem 18extends into position between the sides of the frame 48, and is securedat 88, as the device is viewed in Figure 5. to the downturned leg of theshifter member 54. A compression spring 82 is confined between the'sprindisk 18 and the downturned leg of the shifter member 54. When theelectromagnet is deenergized and the armature 69 released, the spring 82actuates the shifter members 52 and 54 in a horizontal direction to theright as the device is viewed in Figure 5. This movement of the member52 swings the motion transmitting member 42 from the position shown indotted lines in Figure to its position as shown in full lines, therebydisabling the operative connection bee and the control valve.

A thermocouple, indicated at 85, is placed in position so that the hotjunction 86 thereof will be heated by the pilot flame as long as thepilot flame is burning. The construction of the ther-,

mocouple may be similar to that more fully disclosed in Oscar J. LeinsPatent No. 2,126,564, granted August 9, 1938, or the construction of thethermocouple and the leads therefor may be of any other suitable orpreferred form.

For the purpose of the present description, suflice it to state that theparticular thermocouple 85 selected-for illustration comprises an outertubular metallic thermocouple element 81 and an inner metallicthermocouple element 88 of different thermoelectric characteristics. Theinner thermocouple element 88 is joined at one end to the outer end ofthe outer thermocouple element 81 to form the thermojunction which isplaced in position to be heated by the pilot light. An inner leadconductor 89 isfjoined to the inner thermocouple element 88 to form aninternal thermojunction 98, and an outer tubular lead conductor 9| isconnected to the outer thermocouple element 81, for instance, through asleeve to form a third thermojunction. The inner lead conductor 89isinsulated from the outer lead conductor M, for instance, by wrappingof insulation on the inner lead conductor.

The magnetframe 12 is secured, for example, to a terminal bushing 92 inthe manner more fully disclosed in the copending aplication of Y RichardK. Engholdt, Serial No. 328,923, filed April 10, 1948. The coil 94 0fthe electromagnet is wound around the legs of the magnet frame 12. Thebushing 92 is shown as externally threaded for threaded engagement witha nut 95 by means of which the bushing is clamped to the-outer end ofthe electromagnet and armature enclosing and mounting cup 13.

A quick detachable or removable connection is preferably providedbetween the ends of the leads 89 and'9I opposite the ends which areconnected to the thermocouple elements. This removable lead connectionmay be of the form disclosed in the copending application .of Richard K.Engholdt above identified, and is illustrated in that form, it beingunderstood that this connection may be of any other suitable orpreferred. form. Sufiice it for purposes of this description to statethat the inner lead 89 has a connector cone 98 which seatsin thecorrespondingly recessed outer end of the terminal tip 91 and is clampedin'contact therewith by a connector sleeve 98. The adjacent end of theouter tubular lead conductor 9| is connected in circuit with one side ofthe coil 94 through the connector sleeve I88 and the bushing 92, and theother side tion and the shifter normal motion transmitting of the coilis connected to the terminal tip 91,

the parts being suitably insulated as shown.

The heat of the pilot light on the thermocouple 85 energizes theelectromagnet 68 sufiicient to hold the armature 69 in attractedposition against the pole ends of the magnet frame 12,- and the 1shifter members 52 and 54 in their non-disabling positions when thearmature is engaged with the pole ends of the magnet frame, but thisthermoelectric current is not capable of moving the armature toattracted position and the shifter members 52, 54 to their non-disablingpositions. Cooking or resetting means is therefore provided for cockingthe armature 89 to attracted posimembers to their non-dis ablingpositions.

The cooking means comprises a cooking arm I85 slidable in the frame 40in a transverse di- 'rection relative to the direction of movement ofthe stem 18 and its connected shifter member 54. v v

The inner end of the arm I85 is slidable through an opening I86 in theadjacent side of the frame 48 and has a catch at I81 for limiting theoutward movement of the arm I85. The arm I85 is adapted to be actuatedmanually by a cooking button I88 secured at I89 to the upturned flangeH8 at the outer end of the arm. The button I88 extends outwardlythrough'a guide opening H2 in the wall I I3 of the outer housing orenclosure II4, the cooking button being disposed in such location as tobe conveniently accessible for the purpose of resetting or cocking theshifter members 52, 54 to their non-disabling positions, and thereby themotion'transmitting rod 42 to its position as shown in dotted lines inFigure 5. The actuator member 35 extends into the housing or enclosureII4 through an opening I I8 in the top wall-thereof, as shown in Figure3.

Within its length, the arm I85 has an inclined edge or shoulder I28which engages a correspondingly inclined edge or shoulder I2I on theshifter member 54. Pressing of the inwardly with the parts positioned asshown in Figure 2, slides or moves the arm I85 inwardly,

I and this inward movement of the arm I85, by engagement of its inclinededge I28 with the in clined'edge I2I of the shifter member 54, wedges oractuates the member 54 and the connected stem the magnet frame.-

For the purpose of returning the'cocking arm I85 and its button I88 totheir outwardly projected positions upon completion of the cookingoperation, the arm I85 is provided with an integral lug I24 whichengages at I25 the adjacent 'edge of the pivoted arm 52, and a coiledtenwise direction about its pivot 53 and, by cooperasio'n spring-I26 isconnected at one end at I21 to the free end of the arm -52 and, at itsopposite end at I28, to a fixed part of the frame 48. When the arm I ispressed inwardly in the cooking operation, the pivoted arm 52 pivot '53in a counterclockwise direction (Figure 2) by the thrust of the lug I24on the arm 52 at I25. The roller 68 slides the accompanying movement ofthe shifter member 54, with its connected stem 18 and armature 69, tothe left. When the cocking button I88 is released upon completion of thecocking operation, the springI-26 swings the arm 52 in a clocktion withthe lug I24, moves'the arm I85 and its cocking button I88 isswung aboutits.

in the guide 62 in I button I08 to their normal outwardly projectedpositions as shown in Figure 2.

The valve member 44, which is under the control of the automatic timerand safety shutoff means, is enclosed within a valve housing I and thebase member I31, and at the center of the flexible member I39 is anopening for receiving the head 46 of the valve stem 43, the flexiblemember being secured tightly and in sealed relation to the head 46asindicated at I40. The head 46 operates slidingly in the base memberI31 at I42, and the member I3! is inclined up-toward the bearing portionI42 to provide clearance above the flexible member I39 to allow for theflexing of this member with the movement of the valve stem 43. The valvehousing I35 is recessed at I44 to provide clearance below the flexiblemember I39.

The valve housing I35 has a wall or partition I45 separating the inletchamber I46 from the outlet chamber I48. The wall I45 has a valveopening I49 for placing the inlet chamber I46 in communication with theoutlet chamber I48 when the valve member 44 is in open position. Anannular valve seat I52 is provided about the valve opening I49, uponwhich valve seat the valve member 44 is adapted to seat to shut offcommunication between the inlet and outlet chambers and thereby thesupply of fuel for the main burner. has a valve gasket or yieldingfacing I54 for cooperation with the valve seat I52. A cap nut I55 hasdetachable threaded engagement with the valve body. preferably with agasket I56 therebetween. A compression spring I58, confined between thevalve member 44 and the cap nut I55, normally urges the valve memberinto closed position engaging the valve seat I52.

Contiguous sections of the fuel supply pipe II are connected incommunication with the inlet and outlet chambers I46 and I48 of thevalve housing I35. If desired, the apparatus may be concealed behind anysuitable trim plate, of which the outer housing H4 is illustrative, thereset or cocking button I08 projecting through the opening -I,I2 in thistrim plate or housing so as to be accessible at all times.

For the purpose of indicating when the device is set or cocked inoperating position, an arm I60 is pivoted at I62 to the front side ofthe frame 40 inwardly of the outer housing or trim plate II4. This armI60 has an arcuate portion I63 which constitutes in effect a flag orindicator arm having a red or other colored or appropriately markedportion I65 which, when the device is set or cocked in operatingposition. is displayed through an opening I68 in the front wall of thehousing II4 to indicate that the device is in operating position. Anangular arm I10, carried by the shifter member 54 for movementtherewith, is pivoted at I12 to the arm I60 to swing this arm I60 aboutits pivot I62 with the movement of the shifter member 54. When the pilotlight goes out, the armature 69 is released and the spring 82 actuatesthe shifter means in a direction to disable the motion-transmittingconnection between the automatic timer and the valve,

with an accompanying closing of the valve, and,

at the same time, the indicating marking I65 is moved out of registerwith the opening I68 so that The valve member 44 preferably it may beascertained at a glance that the device is not cocked or set inoperating position.

To start the operation of the apparatus, the following sequence isfollowed:

The cooking arm I05 is pressed inwardly from the position shown inFigure 2 by engaging the button I08 with the hand or finger andimparting pressure thereto. The inward movement of the arm I05, byengagement of the inclined shoulder I20 with the inclined shoulder I2Iof the shifter member 54, wedges or shifts the member 54 to the left asthe device is viewed in Figure 2, moving the stem 10 and the armature'69 with it until the armature is brought to attracted position inengagement with the pole ends of the magnet frame. At the same time, theengagement of the lug I24 with the shifter member 52 swings this memberin a counterclockwise direction about its pivot 53 against the tensionof the spring I26, and the roller 60 on the pivot pin 53 moves to theleft (Figure 2) in the guide channel 62.

The pilot burner is lighted, or, having been lighted, heats thethermocouple 85, and the cocking button I08 is held pressed inwardlyuntil the heat of the pilot flame on the thermocouple en-. ergizes theelectromagnet sufficiently so that it will hold the armature 69 inattracted position and the shifter members 52 and 54 in cocked position.

When the electromagnetds energized sufficiently to hold the armature 69in attracted position and the shifter members 52 and 54 in cookedposition, the cocking button I08 is released and the parts are heldcooked by the electromagnet 68. The motion transmitting member 42 is nowdisposed axially or, as shown in dotted lines in Figure 5, verticallybetween the actuator member 35 and the valve stem head 46 and theindicator coloring or marking I65 is in register with the opening I68.Release of the cocking button I 08 allows the spring I26 to swing themember 52 in a clockwise direction about its pivot 53, and theengagement of the member 52 with the cooking arm I05 at I25 returns thiscocking arm and the cooking button I08 to their outwardly projectedposition.

If the pilot burner is not lighted to produce the thermoelectric currentfor holding the armature 69 in attracted position upon setting the sameto that position, the spring 82 will act upon release of the cookingbutton to move the shifter members 52 and 54 to the positions shown inFigures 2 and 5. This swings the motion transmitting member 42 to theposition shown in full lines in Figure 5, thereby disabling the motiontransmitting connection between the actuator member 35 and the valvestem head 46. Likewise, if after the parts are set in their cockedposition and the pilot burner is lighted to hold the parts in theircocked or operating positions the pilot burner is extinguished, thearmature is released and the shifter members operate to disable themotion transmitting connection between the actuator member 35 and thevalve stem head 46.

If, however, with the device set in cooked or operating position and thepilot flame burning to energize the electromagnet sufflciently to holdthe device in operating position, the motion transmitting rod 42 will bepositioned axially or, as shown in dotted lines in Figure 5, verticallybetween the actuating member 35 ndthevalve stem head 46 as alreadydescri With the device cocked when the control knob 3I is-in'the setposition illustrated in Figure 1, theactu- 2 are held in theirraisedpositions in proper cooperation with the automatic timer drivingmechanism. When the time arrives for the cooking operation to start, aspredetermined by the setting of the adjustable member 29, the automatictimer operates to impart a downward thrust to the actuator member 35.This memher is moved down to the dotted line position illustratedinFigure 3, this downward move-1 ment depressing the valve stem 43 andopening the valve 44. The manually actuated valve I4, having been movedto open position as a preparatory step in the setting of the timingmechanism 20, it will be obvious that the opening of the control valve44 will allow gas to flow to the burner I 0 for ignition by the flameissuing from the pilot burner l5.

At the hour predetemined for'stopping the cooking operation (shown bythe position of the adjustable member 28 as being six o'clock), theautomatic timer operates to permit the valve.

to move upwardly to closed position. At this time'the control knob 33 isin the off position, signifying that the control valve has been turnedoff or closed for shutting off the supply of fuel I to the burner l0. Ineach of the positions de- ,scribed, the indicator marking I65 indicatesto the housewife that the pilot light is burning and the safety shutofiparts are held in cocked position.

As already pointed out,- if for any reason the pilotlight isextinguished with the burner III in operation 'orout of operation, themotion transmitting member 42 is shifted'to the disabled position, shownin full lines in Figure 5, under the action of the spring 82;

tion transmitting member, so that this member H will be shifted todisabled position even though the head 45 is being held down against thevalve stem head 46 in the operation of holding the valve 44 in openposition.

The apparatus is so constructed and arranged that in the event ofbreakage of parts, interruption of the thermoelectric circuit, or othermalfunctioning of the apparatus, there will be an inherent tendency forthe apparatus to fail safe, i, e., for the failure of the apparatus toresult in closing of the valve 44 to shut off the supply of fuel to theburner.

When reset button I08 is pushed in to cock the armature 69 to attractedposition, the line of motion of the axis of the otion transmittingmember 42 is from A to B as shown in dot and dash lines in Figure 2, andalthough the member 42 'has moved, it is still in a disabling position.When reset button I08 is released, and if the electromagnet is energizedto hold the armature 69 in attracted position to the magnet frame 12,the line of motion of the axis of the-member 42 Once the motiontransmitting member hasbeen tripped into this disabled position, it willremain in that position" 2,903,072 S ator member 35 and the iiiotiontransmitting rod will be from B to C. If the clock stem or actuatingmember 35 is up, this will swing the member 42 into its operatingposition so that downward 'movementof the member 35 will open the valve.If the member 35 is already down, the member 42 will also swing to itsoperating position, but due to the round end 45 and the conical end 46,

camming action takes place and the valve will open immediately. If,however, the armature 69 is not held attracted to the magnet 12, theline of motion of th axis of the member 42 when the button IE3 isreleased will be from B to A and the member 42 will remain in adisabling position at all times. In other words, the member 42 cannotpossibly go to an operating position unless the armature 69 is held tothe magnet 12. If the armature 69 is held to the magnet 12, the stem ormember 42 will move to operating position whether the clock stem 35 isin the upward or downward position.

The embodiment of the invention shown in the drawings is forillustrative purposes only, and

it is to be expressly understood that said drawings and the accompanyingspecification are not to be construed as a definition of the limits orscope of the invention, reference being had to the appended claims forthat purpose.

I claim: 1. A gas burner control apparatus comprising 7 a main gassupply pipe for connection with the burner, a valve in said pipe tendingto remain closed, a time controlled mechanism, motion imparting meansbetween said time controlled mech- I anism and said valve and having afirst position for opening the valve by means of said time controlledmechanism and a second position in which it will not open said valve bysaid time controlled 4 means, a pilot burner, disabling means associatedwith the pilot burner and movable upon extinguishment of the pilotburner to move said motion transmitting means to said second position,cocking means for cooking said disabling means to non-disablingposition, and means operative to return said cocking means to itsoriginal position upon completion of the cocking operation and with saiddisabling means remaining incocked position.

2. A gas burner control apparatus comprising a main gas supply pipe forconnection with the burner, a valve in said pipe tending to remainclosed, a time controlled mechanism, motion imparting means between saidtime controlled mechanism and said valve and having a first position foropening the valve by means of said time controlled mechanism and asecond position in which it will not open said valve by said timecontrolled means, a pilot burner, disabling means associated with thepilot burner and movable upon extinguishment of the pilot burner to movesaid motion transmitting means to said second position, and cookingmeans movable in a generally lateral direction with respect to .thedirection of movement of said disabling ineans for cooking saiddisabling means to non-disabling position.'

3. A gas burner control. apparatus comprising a main gas supply pipe forconnection with the burner, a valve in said pipe tending to remainclosed, a time controlled mechanism, motion imparting means between saidtime controlled turn said cocking means to ble of transmitting motionmovable to pable of transmitting motion to said valve, shiftsecondposition to disable same, cocking means for cocking said disabling meansto non-disabling position, an enclosure having an opening in the wallthereof, a movable indicator arm having indicator means movable into andout of position for display through said opening to indicate whether thedevice is cocked, and means carried by said disabling means foractuating said mov able indicator arm.

4. A gas burner control apparatus comprising a main gas supply pipe forconnection with the burner, a valve in said pipe tending to remainclosed, a time controlled mechanism, motion imparting means between saidtime controlled mechanism and said valve and having a first position foropening controlled mechanism and movable to a second position in whichit'will not open said valve by said time controlled means, a pilotburner, disabling means associated with the pilot burner and movableupon extinguishment of the pilot burner to move said motion transmittingmeans to said second position to disable same, cocking the valve bymeans of said timev means for moving said disabling means tonondisabling position, means operative to return said cocking means toits original position upon completion of the cocking operation and withsaid disabling means remaining in cocked position, and means actuated bysaid disabling means and free of the means for returning the cockingmeans to normal for indicating whether the device is cocked.

5. In burner control apparatus, the combination with a burner and atherewith, of a control valve governing the flow of fuel to the burner,mechanism for operating said valve comprising a motion transmittingmember having a first position where it is capable of transmittingmotion to said valve and movable to a second position where it isincapable of transmitting motion to said valve, shifter means movable ina direction to shift said motion transmitting member into said secondposition, an electromagnet adapted for holding said last means againstoperation, a thermocouple placed in position to be heated by the pilotburner and connected in circuit with said electromagnet, cocking meansmovable in a generally lateral direction with respect to the directionof movement of said shifter means for moving said shifter means to theposition where it is held by the electromagnet, and means operative toreits original position upon completion of the cocking operation andwith the shifter means held in cocked position by the electromagnet.

6. In burner control apparatus, the combination with a burner and apilot burner associated therewith, of a control valve governing the flowof fuel to the burner, mechanism for operating said valve comprising amotion transmittin member having a first position where it is capaasecond position where it is incaer means movable in a direction to shiftsaid motion transmitting member into said second position, anelectromagnet adapted for holding said last means against operation, athermocouple placed in position to be heatedby the pilot burner andconnected in circuit with said electromagnet, cocking means movable in agenerally lateral pilot burner associated.

sition operating with and movable with said shifter member in adipletion of the cocking operation and with the shifter means held incocked position by theeleg y tromagnet, and an indicator operativehnected with said shifter means and 'ac'tua ed by the movement ofsaid'shifter means for indicating whether the device is cocked.

7. In a device of thecla ss described, a valve, mechanism for operating''said valve comprising a motion transmitingfinembe'r having a firstpowhereit is capable of transmitting motion to said valve and movable toa second position where it isincapable of transmitting motion to saidvalve, shifter means, said shifter means comprising a s'hifter memberand a shifter arm pivoted to said shifter member, said shifter armcosaid motion transmitting member rection to. move said motiontransmitting member into said second position, an electromagnet, and anarmature connected with said shifter member and, when. attracted,holding said shifter member and said shifter arm against shifting saidmotion transmitting member into said second position.

8. In a device of the class described, a valve, mechanism for operatingsaid valve comprising a motion transmittingv member having a firstposition where it is capable of transmitting motion to said valve andmovable to a second position where it is incapable of transmittingmotion to said valve, shifter means, said shifter means comprising ashifter member and a shifter arm pivoted to said shifter member, saidshifter arm cooperating with said motion transmitting member and movablewith said shiftermember in a direction to move said motion transmittingmember into said second position, an electromagnet,

an'armature connected with said shifter mem- I said shifter member forcooking the armature to to said valve and and the shifter means to theit is'held when the armature said cocking means and attracted positionposition in which is attracted, means on cooperable with the shifter armfor swinging said arm about its pivot in the cocking operation to movesaid motion transmitting member to a third position in which it isincapable of transmitting motion to said valve, and spring meansconnected to said arm for swinging same in a direction to return thecocking means to normal when same is released upon completion of thecocking operation.

9. In a device of the class described, a valve, mechanism for operatingsaid valve comprising a motion transmitting member having a firstposition where it is capable of transmitting motion to said valve and asecond position where it is incapable of transmitting motion to saidvalve,-shifter means tending to shift said motion transmitting, memberinto said second position, said shifter means comprising a shiftermember and a shifter arm pivoted to said shifter member and cooperatingwith said motion transmitting member, an electromagnet, an armatureconnected with said shifter member and, when attracted, holding saidshifter member against shifting said motion transmitting member intosaid second position, cocking means cooperating with said shifter memberfor cocking the armature to attracted position and position in which itis held when the armature is attracted, means on said cocking. means andcooperable with th shifter arm for swinging said arm about its pivot inthe cocking operation, spring means connected to said arm for swingingsame in a direction to return the cocking means to normal when same isreleased upon completion of the cooking operation, a roller at thepivotal connection between the shifter arm and the shifter member, and aguide for said roller.

'. In a device of the class described, a valve,

mechanism foroperating said valve comprising a motion transmittingmember having a first position where it is capable of transmittingmotion to said valve and a second position wher it is incapable oftransmitting motion to said valve, shifter means tending to shift saidmotion transmitting member into said second position, said' shiftermeans comprising a shifter member and a shifter arm pivoted to saidshifter member and cooperating with said'motion transmitting member, anelectromagnet, an armature connected with said shifter member and, whenattracted, holding said shifter member against shifting said motiontransmitting member into said second position, cocking means cooperatingwith said shifter member for cocking the armature to attracted positionand the shifter means to the position in which it is held when thearmature is attracted, means on said cocking means and cooperable withthe shifter arm for swinging said arm about its pivot in the cookingoperation, spring means connected to said arm for", swinging same in. adirection to return the cocking means to normal when same is releasedupon completion of the cocking operation, and a pivoted indicator armhaving pivotal connection with said shifter means for indicating whenthe device is cooked.

11. In a device of the class described, a valve, mechanism for operatingsaid valve comprising a motion transmitting member having a first posi-'tion where it is capable of transmitting motion to said valve and, asecond position where it is incapable of transmitting motion to saidvalve, shifter means tending to shift said motion transmitting memberinto said second position, said shifter means comprising a shiftermember having an inclined shoulder, an electromagnet, an armatureconnected with said shifter member and, when attracted, holding saidshifter member against shifting said motion transmitting member intosaid second positiomand a cooking mem-- ber movable generally laterallywith respect to the direction of movement of said shifter member andhaving an inclined shoulder cooperable with the inclined shoulder ofsaid shifter member for actuating said member in a direction to cook thearmatureto attracted position and the shifter means to the position inwhich it is held when the armature is attracted.

12. In a device of the class described, a valve, mechanism for operatingsaid valve comprising a motion transmitting member, a shifter memberhaving an inclined shoulder, an electromagnet, an armature connectedwith said shifter member and, when attracted, holding said shiftermember against shifting said motion transmittingmemoer, a cooking membermovable generally lateral- .y with respect to the direction of movementof ;aid shifter member and having an inclined :houlder cooperable withthe inclined shoulder if said shifter member for actuating said mem- )6!in a direction to cock the armature to atthe shifter means to theshifting cooperation with said motion transmitting member fordisabling'saidmotion' transmitting member when the electromagnet isdeenergized and cooperating with said cocking member for returning saidcocking member to normal position upon release thereof and with saidshifter member in cocked position.

13. In a device of the class described, a valve, mechanism for operatingsaid valve comprising a motion transmitting member, a shifter memberhaving .an inclined shoulder, an electromagnet,

an armature connected with said shifter member, and, when attracted,holding said shifter member against shifting said motion transmittingmember, a cocking member movable generally laterally with respect to thedirection of movement of said shifter member and having an inclinedshoulder cooperable with the inclined shoulder of said shifter memberfor actuating said member in a direction to cock the armature toattracted position the position in which it is held when the armaf tureis attracted, a shifter arm pivoted to said tending to shift said motiontransmitting shifter member, said pivoted shifter arm having shiftingcooperation with said motion transmitting member for disabling saidmotion transmitting member when the electromagnet is deenergized andcooperating with said cocking member for returning said cocking memberto normal position upon release thereof and with said shifter member incocked position, a roller at the-pivotal connection between the shifterarm and the shifter member, a supporting frame, a member carried by saidframe and having aguidefor said roller, and an indicator arm pivoted tosaid frame and having pivotal connection with said shifter member toindicate when the device is cocked.

--14. In a burner control apparatus, the combination with a burner and apilot burner asso- 'ciated therewith, of a control valve governing theflow of fuel to the burner, mechanism for operating said valvecomprising a motion transmitting member having a first position where itis capable of transmitting motion to said valve and a second positionwhere it is incapable of transmitting motion to said valve, shiftermeans member into said second position, an electromagnet adapted forholding said last means against operation, thermal means subject to theheat of the pilot burner for controlling said electromagnet, cockingmeans operable to cock said shifter; mean to the position where it isheld by the electromagnet, and means operative to return said cockingmeans to normal upon completion ofthe cooking operation, said motiontransmitting member being returned to said first posiapparatus, thecombiof a control valvegovernto said burner, time controlled means,motion transmitting means-effective to open and close said valve atdifferent preselected times under the control of said time controlledmeans, a pilot burner, thermally controlled means subject to the heat ofthe .pilot for rendering said motion and the shifter member to forswinging movement therewith for igniting the fuel at the transmittingmeans ineffective to open said valve in the event the pilot isextinguished, and cooking means movable from a first position to asecond position and back to said first position to cause said motiontransmitting means to be set, when the pilot is ignited, in positionwhere.

motion transmitting member into said second position, an electromagnetadapted for holding said last means against operation, a thermocoupleplaced in position to be heated by a flame in proximity to the burnerand connected in circuit with said electromagnet, cocking means movablefrom a first'position to a second position to move said shifter means tothe position where it is held by the electromagnet, and means operativeto return said cocking means to its first Y position upon completion ofthe cooking operato said valve and a second position where it isincapable of transmitting motion to said valve, shifter means tending toshift said motion transmitting member into said second position, saidshifter means comprising a shifter member and a shifter arm pivoted tosaid shifter member and cooperating with said motion transmittingmemher, an electromagnet, an armature connected with said shifter memberand, when attracted, holding said shifter member against shifting saidmotion transmitting member into said second position, cocking meanscooperating-with said shifter member for cooking the armature toattracted position and the shifter means to the position in which it is.heldwhen the armature is attracted, and means on said cockin means andcooperable with the shifter arm to move said motion transmitting memberto a third position in which it is incapable of transmitting motion tosaid valve and to hold said motion transmitting member in said thirdposition until said cocking means is released.

17. A burner control apparatus comprising a fuel supply pipe forconnection with the burner, a valve in said pipe tending to remainclosed, valve actuating means, a motion imparting member between saidvalve actuating means and said valve and having a first position inwhich it is operable to open the valve by means of said valve actuatingmeans, a second position in which it will not open said valve by saidvalve actuating means, and a third position different from both saidfirst and second positions and in which it will not open said valve bysaid valve actuating means, thermally controlledmeans responsive to theheat of a flame and operable to hold said motion imparting member insaid first position when the flame is burning and to move said motionimparting member to said second position upon extinction of the fiame,and means movable in one direction from its original position to movesaid thermally controlled means to the position in which it is held bythe heat of the flame and said motion transmitting member to said thirdposition, said last means being movable in the opposite direction to itsoriginal position and operable in this last mentioned movement to freesaid motion transmitting member for movement to its first position.

-18. In burner control apparatus, the combinacontrol valve governingburner, mechanism for tion with a burner, of a the fiow of fuel to, the

. operating said valve comprising a motion transmitting member having afirst position wherein it is capable of transmitting'motion to saidvalve and movable to a second position wherein it is incapable oftransmitting motion to said valve. shifter means movable in a directionto shift said tion and with the shifter means held in cocked position bythe electromagnet, said motion imparting means being movable to a thirdposition incapable of transmitting motion to said valve, upon movementof said cocking means to said second position.

19. A burner control apparatus comprising a fuel supply pipe forconnection withthe burner, a valve in said pipe tending to remainclosed, valve actuating means, a motion imparting member between saidvalve actuating means and said valve and having a first position inwhich it is operable to open the valve bymeans of said valveactuatingmeans, a second position in which it will not open said valve means, anda third position different from both said first and second positions andin which it will not open said valve by said valve actuatinil means,thermally controlled means operable to permit maintenance of said motionimparting member in said first position, reciprocatory reset means forsaid thermally controlled means, said reset means having a normallyoutwardly projected position and movable to an opposite position, saidmotion imparting member being positioned in said third position by saidreset means when said reset means is in said opposte position, and meansfor returning its outwardly projected position and for'moving saidmotion imparting member from its third position to its first positionsaid first position when said thermally controlled means is operable topermit maintenance of said motion imparting member in said 20. In valvecontrol apparatus, the combination with a valve, automatic valveactuating means, motion trans'miting means eflective to open and closesaid valve under the control of means, means for v movement to saidsecond position and back to'said' first position, said motiontransmitting means to be set in position where it is effective to openand close said valve under the control 01 said automatic valve actuatingmeans, said motion transmitting means being movable to a position inwhich it is ineffective to open and close said valve under the controlof said automatic valve actu ating means and held in said position whensaid cocking means is in its second position.

2l.- In valve control apparatus, the combination with a. valve,automatic valve actuatin means, motion transmiting means effective toopen and close said valve under the control of said automatic valveactuating means. means for rendering said motion transmitting meansineffective to open said valve, and cooking means movable from a firstposition to a second position and back to said first position, saidmotion transmitting means being adapted by the movement of said cockingmeans from its first position to by said valve actuating said resetmeans to and maintaining it infirst position;

the automatic timer for to a second position in which it is ineffectiveto open the valve, being adapted said motion transmitting means uponmovement of said cocking means from its second position back to itsfirst position to move back either to the first position in which saidmotion transmitting means is ineflective to open the valve or to athirdposition in which said motion transmitting means is eiiective to openthe valve depending upon the position of the means for rendering themotion transmitting means ineflective. I

22. In combination, a fluid supply conduit, a valve for controlling thesupp y of fluid through said conduit, motion tomatic timer for actuatingsaid valve through said motion transmitting means, means comprising amovable armature operable to retracted position to disable said motiontransmitting means, an electromagnet for holding said armature inattracted position in which position of said armature said motiontransmitting means may be positioned, for actuation of the' valvetherethrough, a thermoelectric generator energized by the heat of aflame and connected in circuit with said electromagnet for energizingsaid electromagnet when the thermoelectric generator is energized by theheat 01 the means for resetting the armature to attracted until theelectromagnet is energized to hold the armature in attracted position.

said conduit, an automatic timer for actuating said valve, meanscomprising a movable armature operable to retracted tion of said valveby said automatic timer, an electromagnet for holding said armature inattracted position in which position of said armature said automatictimer may be operableto actuate said valve, a thermoelectric generatorenergized by the heat ofa flame and connected in circuit with saidelectromagnet for energizing said electromagnet when the thermoelectricgenerator is energized by the heat or the flame, and means for resettingthe armature to attracted position and including means for conditioningtransmitting means, an auposition to prevent actuae opening said valveonly ply of fluid through moelectric generator is energized by the heatof a ii. said electromagnet is energized to hold said armature inattracted position, said automatic timer being incapable of opening saidvalve until the resetting operation is completed.

24. In combination, a main burner, a fuel supply line for said burner, apilot burner for said -main burner, valve means in said fuel supply linefor controlling the supply of fuel through said line, an automatic timerfor actuating said valve means, means comprising a movable armatureoperable to retracted position to prevent actuation or said valve meansby said automatic timer,- an electromagnet for holding said armature inattracted position, in which position of said armature said automatictimer may be operable to actuate said valve means, a thermoelectricgenerator adapted to be energized by the heat oi the pilot burner andconnected in circuit with said electromagnet for energizing saidelectromagnet when the thermoelectric generator is energized by the heatof the flame, and means for resetting the armature to attracted'positionand for conditioning the automatic timer for opening position, saidautomatic timer being incapable of opening said valve mean until theresetting operation is completed.

25. In combination, a'fluid supply-conduiaa controlling member operableto control the suptimer for actuating means comprising a movablearmature operable to retracted position to prevent actuation of saidcontrolling member by said automatic timer, an electromagnet for holdingsaid armature in attracted position, in which position or said armaturesaid automatic timer may be operable to actuate said controlling member,a thermoelectric generator energized by the heat or a flame andconnected in circuit with said electromagnet for energizing saidelectromagnet when the therthe flame, and means for resetting thearmature valve until the resetting operation is completed.

' CLARENCE WAN'IZ.

said valve means only if said electromagnet is energized to hold saidarma ture in attracted said conduit, an automatic said controllingmember,

